55451911 has 2 divisors, whose sum is σ = 55451912. Its totient is φ = 55451910.

The previous prime is 55451843. The next prime is 55451927. The reversal of 55451911 is 11915455.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55451911 - 2⁷ = 55451783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55451941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27725955 + 27725956.

It is an arithmetic number, because the mean of its divisors is an integer number (27725956).

Almost surely, 2^55451911 is an apocalyptic number.

55451911 is a deficient number, since it is larger than the sum of its proper divisors (1).

55451911 is an equidigital number, since it uses as much as digits as its factorization.

55451911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4500, while the sum is 31.

The square root of 55451911 is about 7446.6039910821. The cubic root of 55451911 is about 381.3339796726. Note that the first 3 decimals are identical.

The spelling of 55451911 in words is "fifty-five million, four hundred fifty-one thousand, nine hundred eleven".